interface not registered

[sinaco]

When I tried to write data using datasocket, there is an error while debugging the line:

DS_Open (URL, DSConst_Write, UpdateDSCallback, NULL, &DSWriteHandle);  

The error is:

Function DS_open:(return value==-2147221163[0x80040155]).interface not registered.

What should I do to slove the problem. Also, I am not clear of how to set up the URL. Does one file folder should be contained in it? All suggestions are appreciated.

[Kelly_R]

Hi sinaco,

If you look at the  CVI help for the DS_Open function, it will give you a description of how the URL should be formatted, as well as several example URLs that you can look at.  One test that I would encourage you to try is running datasocket example programs that ship with CVI to ensure that these work without error.  These sample programs are in the C:\Program Files\National Instruments\CVIxx\samples\datasocket folder.

Additionally, you may want to look at using network variables.  Sample programs can be seen in C:\Program Files\National Instruments\CVIxx\samples\networvariable.